File this under: strange inventions. Designed and built by University of Washington student Kaylene Kau, this prosthetic tentacle was designed for dexterity and grip. According to Kau, this design is budget-friendly, meaning that there's less machinery involved, which translates cheap and easy maintenance. Continue reading for a video and more information.

On a bright note, the tentacle arm design will enable someone to grip multiple objects just like a real hand would. Unfortunately, more complex actions, like writing or picking up small objects, could be a problem. If the starting price point is low enough, these may sell well during Halloween as well.